Rebuild does not work with cells

[Christopher Lefelhocz]

The rebuild command will not work with cells. The command is dropped at the api layer.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/109646

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/109730

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/109730
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=cf024616111aab8c5f9dfdb350ab9cdff0633f91
Submitter: Jenkins
Branch: master

commit cf024616111aab8c5f9dfdb350ab9cdff0633f91
Author: Christopher Lefelhocz <email address hidden>
Date: Fri Jul 25 15:47:32 2014 -0500

    Add unit tests to cells conductor link

    Adding unit tests to verify ConductorTaskRPCAPIRedirect
    and compute/api.py are properly hooked. If they become out
    of alignment then calls can be potentially ignored. We can't
    blindly error in the case of ignoring as this is used
    legitimately in other cases.

    Change-Id: Iec02d4a5906a5851c1e9c8258a2d77f908ec65bc
    Partial-Bug: 1348642

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/109646
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=f17ad7b933457f4a1b35fed9bbe252f55ebf29ae
Submitter: Jenkins
Branch: master

commit f17ad7b933457f4a1b35fed9bbe252f55ebf29ae
Author: Christopher Lefelhocz <email address hidden>
Date: Fri Jul 25 11:20:57 2014 -0500

    Fix rebuild with cells

    When rebuild_instances switched to a compute task it broke
    cells since the cast was dropped as it didn't match.

    This change moves the rebuild_instances to conductor and
    also adds some unit tests checks on the compute
    task integration point.

    Change-Id: Ic1c575fbca72f1cd34b1dbc6f82023e5b2b392e2
    Closes-Bug: 1348642